/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hugegraph.api.filter;

import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.zip.GZIPInputStream;

import jakarta.inject.Singleton;
import jakarta.ws.rs.NameBinding;
import jakarta.ws.rs.ext.Provider;
import jakarta.ws.rs.ext.ReaderInterceptor;
import jakarta.ws.rs.ext.ReaderInterceptorContext;

@Provider
@Singleton
@DecompressInterceptor.Decompress
public class DecompressInterceptor implements ReaderInterceptor {

    public static final String GZIP = "gzip";

    @Override
    public Object aroundReadFrom(ReaderInterceptorContext context)
            throws IOException {
        // NOTE: Currently we just support GZIP
        String encoding = context.getHeaders().getFirst("Content-Encoding");
        if (!GZIP.equalsIgnoreCase(encoding)) {
            return context.proceed();
        }
        context.setInputStream(new GZIPInputStream(context.getInputStream()));
        return context.proceed();
    }

    @NameBinding
    @Retention(RetentionPolicy.RUNTIME)
    public @interface Decompress {

        String value() default GZIP;
    }
}
